I have a list, songs, which I want to divide into two groups.
Essentially, I want:
new_songs = [s for s in songs if s.is_new()]
old_songs = [s for s in songs if not s.is_new()]
but I don't want to make two passes over the list. I could do:
new_songs = 
old_songs = 
for s in songs:
Which works, but is klunky compared to the two-liner above. This seems like a common enough thing that I was expecting to find something in itertools which did this. I'm thinking something along the lines of:
matches, non_matches = isplit(lambda s: s.is_new, songs)
Does such a thing exist?